Micro:bit BLE Keyboard

Hi again!
I'm trying to make a BLE keyboard with micro:bit to send a keystroke when it is tilted to the right, left, front, back.
This is my code (I've not finish to write all)

var kb = require("ble_hid_keyboard");
NRF.setServices(undefined, { hid : kb.report });

var min = -400;
var max = 400;


  var x = Microbit.accel().x*1000;
  var y = Microbit.accel().y*1000;
  var z = Microbit.accel().z*1000;

if (x > min && x < max && (y > min && y < max && z < (-800))){
  kb.tap(kb.KEY.A);
} else {
    if (x > min && x < max && (y > min && y < max && z > 800)) {
      kb.tap(kb.KEY.F);
    } else {
        if (x > min && x < max && (z > min && z < max && y > 800)) {
            kb.tap(kb.KEY.D);
        } else {
            if (x > min && x < max && (z > min && z < max && y < (-800))) {
                kb.tap(kb.KEY.E);
            } else {
                if (y > min && y < max && (z > min && z < max && x > 800)) {
                    kb.tap(kb.KEY.B);
                } else {
                    if (y > min && y < max && (z > min && z < max && x < (-800))) 
                        kb.tap(kb.KEY.C);
                }
            }
        }
    }
}

I'm using the example of BLE Keyboard here and I receive this error

Uncaught TypeError: Expecting a number or something iterable, got undefined
 at line 1 col 104
...0,0,0],function(){a&&a()})})
                              ^
in function "tap" called from line 16 col 18
  kb.tap(kb.KEY.A);
                 ^

or this one

>New interpreter error: UART_OVERFLOW
>Uncaught ReferenceError: "requirerage" is not defined
 at line 2 col 1
requirerage").write(".bootcde","85,\nPAD_MINUS:86,PAD_PLUS:8...
^
Uncaught SyntaxError: Got '}' expected ','
 at line 11 col 5
    }
    ^

If I make a test with just

print("A");

instead of

kb.tap(kb.KEY.A);

I've no error and the code works as I want.

What it can be?